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Need help what part is this 71 t37

1K views 5 replies 4 participants last post by  PontiacJim 
#1 ·
#2 ·
Transmission Controlled Spark (TCS) vacuum advance valve.

When energized by either the engine temperature (above 225* or below 85*) or transmission switch (high gear for manual trans or Drive high gear for automatics), allows vacuum to be applied to the distributor advance.
 
#6 ·
Won't be of value unless you have all the other related parts to complete the system. I would not use it, nor install it. It was for emissions and essentially retards the timing. Get a Service Manual and check the system diagrams and see if you have all the needed pieces. It is not going to add value to the car.
 
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